ASE A5 · Brakes
Hydraulic, Power Assist & Parking Brake
The largest A5 area: master cylinders, lines and hoses, valves and switches, bleeding and brake fluid, vacuum, hydro-boost and electronic power assist, and parking brakes.
- Questions on the A5 test
- 19
- Share of the test
- 42%
- GearheadPass questions
- 64
- With exhibits
- 11
What this area covers
ASE's task list for Hydraulic, Power Assist & Parking Brake on the A5 Brakes test groups into these tasks. Expect diagnosis-first questions: what's the most likely cause, what should be checked next, and which technician is right.
- Master cylinder diagnosis and bench bleed
- Brake lines, hoses and flaring
- Valves, switches and warning lights
- Bleeding, flushing and brake fluid
- Vacuum, hydro-boost and electronic assist
- Parking brakes, including electronic
How to study it
- This area carries 19 of the A5 test's questions (42%). Give it study time in proportion.
- Work the free questions first, then read every explanation, including the ones you got right; the reasoning is what transfers to new questions.
- 2 of the 5 free questions here are Technician A/B items. Judge each statement on its own before you pick A only, B only, Both or Neither.
- 1 free question uses an exhibit. Read the exhibit's numbers before the answer options.
- Always confirm specifications in the vehicle manufacturer's service information. Test questions assume you would.
Free practice quiz
5 Hydraulic, Power Assist & Parking Brake questions with explanations
All 64 Hydraulic, Power Assist & Parking Brake questions are in the app
Plus a full-length A5 mock, flash cards, and English or Spanish on every question.
More A5 content areas
A5 · 5 questions on the test
Drum Brakes
Drum brake diagnosis and service: hydraulic and mechanical faults, drum measuring and machining, shoes and hardware, wheel cylinders, adjustment and wheel bearings.
A5 · 11 questions on the test
Disc Brakes
Disc brake diagnosis and service: calipers, slides and pads, rotor measuring and machining, installation and burnishing, wheel bearings, and brake versus tire vibration.
A5 · 10 questions on the test
ABS/TCS/ESC
Diagnosing electronic brake controls (ABS, traction control and stability control): warning lights, scan tool and meter tests, sensors, bleeding, module setup and related systems.